Cooperative oscillations of electron-copper-oxygen interaction: Possible relevance for superconduction theory

Journal Article · Sun Jan 01 00:00:00 EST 1989 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.342581· OSTI ID:6889792

Tributsch, H

Interfaces of copper containing crystallized materials (Cu/sub 5/FeS/sub 4/, CuFeS/sub 2/, Cu/sub 2/S, CuS, CuInS/sub 2/, and CuInSe/sub 2/), exposed to oxidation by H/sub 2/O/sub 2/, undergo sustained electrochemical oscillations. They involve electronic (Cu/sup +/), (Cu/sup 2 +/), and (Cu/sup 3 +/) interactions with chemically bound oxygen similar as in superconducting YBa/sub 2/Cu/sub 3/O/sub 7/ or (La,Sr)/sub 2/CuO/sub 4/ and may be a phenomenon of irreversible thermodynamics which is related to the kind of cooperative electron-copper-oxygen interactions which also give rise to high-temperature superconduction. The relevance of the model system is supported by the formation of the H/sub 2/O/sub 2/ species on the surface of high-temperature superconducting materials in contact with ambiental humidity. It is shown how, by a simple modification of the interaction mechanism, an oscillatory phenomenon such as that observed with oxidized copper sulfide interfaces, which follows a limiting cycle, can be converted into a triple-state phenomenon. Such a cooperative mechanism that involves a lowest steady state which is unable to turn over energy may be the background for the pairing of electrons or a related cooperative interaction process in superconduction. As a possible support, no interfacial oscillations could yet be induced with Ba/sub 2/Cu/sub 3/Y/sub 7/.

• Research Organization: Hahn-Meitner-Institut Berlin, Bereich Strahlenchemie, 1000 Berlin 39, Federal Republic of Germany
• OSTI ID: 6889792
• Journal Information: J. Appl. Phys.; (United States), Vol. 65:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
COLLECTIVE EXCITATIONS
SUPERCONDUCTIVITY
COPPER OXIDES
COPPER SELENIDES
COPPER SULFIDES
INDIUM SELENIDES
IRON SULFIDES
YTTRIUM OXIDES
HYDROGEN PEROXIDE
INTERFACES
OXIDATION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY-LEVEL TRANSITIONS
EXCITATION
HYDROGEN COMPOUNDS
INDIUM COMPOUNDS
IRON COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PEROXIDES
PHYSICAL PROPERTIES
SELENIDES
SELENIUM COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity